uvm_fault(0xfffffd8064c4b8f0, 0x38, 0, 1) -> e kernel: page fault trap, code=0 Stopped at VOP_BWRITE+0x34: movq 0x38(%rax),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 34325 8900 0 0x2 0 0 syz-executor.5 458471 69782 0 0x2 0 1 syz-executor.6 VOP_BWRITE(fffffd8065413040) at VOP_BWRITE+0x34 sys/kern/vfs_vops.c:637 ufs_mkdir(ffff800031f0be80) at ufs_mkdir+0x52c sys/ufs/ufs/ufs_vnops.c:1175 VOP_MKDIR(fffffd8074a166d8,ffff800031f0bfe0,ffff800031f0c010,ffff800031f0bf10) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff80002a21ad38,ffffff9c,7a2a4477f200,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3069 syscall(ffff800031f0c190) at syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff800031f0c190) at syscall+0x533 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a2a4477f270, count: 9 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffffd8064c4b8f0, 0x38, 0, 1) -> e ddb{0}> trace VOP_BWRITE(fffffd8065413040) at VOP_BWRITE+0x34 sys/kern/vfs_vops.c:637 ufs_mkdir(ffff800031f0be80) at ufs_mkdir+0x52c sys/ufs/ufs/ufs_vnops.c:1175 VOP_MKDIR(fffffd8074a166d8,ffff800031f0bfe0,ffff800031f0c010,ffff800031f0bf10) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff80002a21ad38,ffffff9c,7a2a4477f200,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3069 syscall(ffff800031f0c190) at syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff800031f0c190) at syscall+0x533 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a2a4477f270, count: -6 ddb{0}> show registers rdi 0xfffffd8065413040 rsi 0 rbp 0xffff800031f0bce0 rbx 0x2 rdx 0 rcx 0xffff80002a21ad38 rax 0 r8 0x101010101010101 r9 0 r10 0xffff80002a267d90 r11 0xb8b5135d52244374 r12 0xfffffd806b2c4bb8 r13 0xcabc __ALIGN_SIZE+0xbabc r14 0xfffffd8065413040 r15 0xfffffd806b2c4338 rip 0xffffffff8233c9c4 VOP_BWRITE+0x34 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800031f0bcb0 ss 0x10 VOP_BWRITE+0x34: movq 0x38(%rax),%r14 ddb{0}> show proc PROC (syz-executor.5) tid=34325 pid=8900 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=83, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a2192a8,0xffff80002a20a570 process=0xffff8000ffff1f28 user=0xffff800031f07000, vmspace=0xfffffd8064c4b8f0 estcpu=36, cpticks=0, pctcpu=0.1, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 80114 56174 69782 0 2 0 syz-executor.6 80114 296209 69782 0 2 0x4000000 syz-executor.6 14879 110540 44568 0 2 0 syz-executor.1 14879 243079 44568 0 3 0x4000080 netcon syz-executor.1 93944 168215 53973 0 2 0 syz-executor.4 93944 460019 53973 0 3 0x4000080 fsleep syz-executor.4 42670 258358 80823 0 2 0 syz-executor.3 42670 180702 80823 0 2 0x4000000 syz-executor.3 8703 321191 2883 0 2 0 syz-executor.0 8703 299557 2883 0 3 0x4000080 fsleep syz-executor.0 8703 260777 2883 0 3 0x4000080 fsleep syz-executor.0 33688 167521 0 0 3 0x14280 nfsidl nfsio 65645 486365 0 0 3 0x14280 nfsidl nfsio 49409 472373 0 0 3 0x14280 nfsidl nfsio 63059 458659 0 0 3 0x14280 nfsidl nfsio 45686 511796 0 0 3 0x14280 nfsidl nfsio 91150 419243 0 0 3 0x14280 nfsidl nfsio 96327 157019 0 0 3 0x14280 nfsidl nfsio 86891 172716 0 0 3 0x14280 nfsidl nfsio 9005 420106 0 0 3 0x14280 nfsidl nfsio 15924 110493 0 0 3 0x14280 nfsidl nfsio 14590 329702 0 0 3 0x14280 nfsidl nfsio 53192 312705 0 0 3 0x14280 nfsidl nfsio 12476 24528 0 0 3 0x14280 nfsidl nfsio 98623 102333 0 0 3 0x14280 nfsidl nfsio 26281 246025 0 0 3 0x14280 nfsidl nfsio 63889 110170 0 0 3 0x14280 nfsidl nfsio 93819 354434 0 0 3 0x14280 nfsidl nfsio 34711 93355 0 0 3 0x14280 nfsidl nfsio 3210 426624 0 0 3 0x14280 nfsidl nfsio 60125 71509 0 0 3 0x14280 nfsidl nfsio 2883 517999 19059 0 3 0x82 nanoslp syz-executor.0 53973 126597 19059 0 3 0x82 nanoslp syz-executor.4 13352 26769 1 0 3 0x80 fsleep syz-executor.4 13352 459274 1 0 3 0x4000080 kqread syz-executor.4 * 8900 34325 19059 0 7 0x2 syz-executor.5 44568 122488 19059 0 3 0x82 nanoslp syz-executor.1 66871 2978 19059 0 2 0x2 syz-executor.2 80823 432891 19059 0 3 0x82 nanoslp syz-executor.3 61698 61225 1 0 3 0x100083 ttyin getty 93234 105515 0 0 3 0x14200 bored sosplice 87595 480225 19059 0 2 0x2 syz-executor.7 69782 458471 19059 0 7 0x2 syz-executor.6 19059 169728 31930 0 3 0x2000082 thrsleep syz-fuzzer 19059 96525 31930 0 3 0x6000082 nanoslp syz-fuzzer 19059 119685 31930 0 3 0x6000082 thrsleep syz-fuzzer 19059 140146 31930 0 3 0x6000082 wait syz-fuzzer 19059 224129 31930 0 3 0x6000082 thrsleep syz-fuzzer 19059 110226 31930 0 3 0x6000082 thrsleep syz-fuzzer 19059 35343 31930 0 3 0x6000082 kqread syz-fuzzer 19059 298943 31930 0 3 0x6000082 wait syz-fuzzer 19059 236403 31930 0 3 0x6000082 wait syz-fuzzer 19059 61540 31930 0 3 0x6000082 wait syz-fuzzer 19059 358761 31930 0 3 0x6000082 thrsleep syz-fuzzer 19059 17264 31930 0 3 0x6000082 wait syz-fuzzer 19059 501652 31930 0 3 0x6000082 wait syz-fuzzer 19059 216657 31930 0 3 0x6000082 wait syz-fuzzer 19059 49175 31930 0 3 0x6000082 wait syz-fuzzer 19059 515449 31930 0 3 0x6000082 thrsleep syz-fuzzer 31930 491273 59386 0 3 0x10008a sigsusp ksh 59386 333699 23986 0 3 0x9a kqread sshd 23986 403619 1 0 3 0x88 kqread sshd 10119 260980 46731 74 3 0x1100092 bpf pflogd 46731 318641 1 0 3 0x80 netio pflogd 68610 451908 76314 73 3 0x1100090 kqread syslogd 76314 256473 1 0 3 0x100082 netio syslogd 72650 505876 1 0 3 0x100080 kqread resolvd 53128 221798 16163 77 3 0x100092 kqread dhcpleased 4205 319557 16163 77 3 0x100092 kqread dhcpleased 16163 461118 1 0 3 0x80 kqread dhcpleased 77037 386013 0 0 3 0x14200 bored smr 82943 265739 0 0 2 0x14200 zerothread 29028 102228 0 0 3 0x14200 aiodoned aiodoned 60187 238729 0 0 3 0x14200 syncer update 61644 152850 0 0 3 0x14200 cleaner cleaner 41934 116463 0 0 3 0x14200 reaper reaper 65144 11516 0 0 3 0x14200 pgdaemon pagedaemon 90805 512828 0 0 3 0x14200 bored viomb 18220 428919 0 0 3 0x40014200 acpi0 acpi0 52937 167686 0 0 3 0x40014200 idle1 71077 204428 0 0 3 0x14200 bored softnet3 18468 413309 0 0 3 0x14200 bored softnet2 5142 508053 0 0 3 0x14200 bored softnet1 72410 427809 0 0 3 0x14200 bored softnet0 30320 254057 0 0 3 0x14200 bored systqmp 5431 324562 0 0 3 0x14200 bored systq 47723 361839 0 0 3 0x14200 tmoslp softclockmp 67142 320722 0 0 3 0x40014200 tmoslp softclock 57661 14198 0 0 3 0x40014200 idle0 1 521040 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 8900 (syz-executor.5) thread 0xffff80002a21ad38 (34325) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82dc1350) #0 witness_lock+0x447 #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x46f sys/kern/sched_bsd.c:470 #3 sleep_finish+0x19b sys/kern/kern_synch.c:414 #4 biowait+0x91 sys/kern/vfs_bio.c:1254 #5 bwrite+0x21c sys/kern/vfs_bio.c:766 #6 ffs_update+0x28b sys/ufs/ffs/ffs_inode.c:111 #7 ufs_mkdir+0x517 sys/ufs/ufs/ufs_vnops.c:1175 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3069 #10 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #10 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b2c43d0) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x1c5 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfb sys/ufs/ufs/ufs_vnops.c:1127 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3069 #10 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #10 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b2c4c50) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3054 #8 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #8 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10196 6550K 6997K 166960K 16080 0 pcb 15 16K 18K 166960K 217 0 rtable 228 7K 7K 166960K 688 0 pf 34 9K 10K 166960K 96 0 ifaddr 45 15K 15K 166960K 103 0 ifgroup 59 2K 2K 166960K 144 0 sysctl 2 0K 0K 166960K 2 0 counters 66 36K 36K 166960K 116 0 ioctlops 0 0K 4K 166960K 1586 0 iov 0 0K 16K 166960K 131 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1417 89K 89K 166960K 2756 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 31 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 166 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 89K 166960K 2607 0 sigio 0 0K 0K 166960K 137 0 proc 69 91K 115K 166960K 800 0 subproc 117 7K 7K 166960K 208 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 165 0 in_multi 88 6K 7K 166960K 216 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 756 0 pfkey data 0 0K 0K 166960K 35 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 382 224K 241K 166960K 28019 0 UVM aobj 131 4K 4K 166960K 131 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 198 0 NDP 13 0K 1K 166960K 70 0 temp 78 6772K 6851K 166960K 23355 0 kqueue 13 20K 24K 166960K 221 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 226 0 223 4 3 1 4 0 8 0 rtentry 112 224 0 120 4 0 4 4 0 8 0 unpcb 144 2523 0 2506 21 20 1 6 0 8 0 syncache 336 12 0 12 5 5 0 1 0 8 0 tcpqe 32 102 0 102 3 3 0 1 0 8 0 tcpcb 808 511 0 503 14 12 2 8 0 8 0 arp 120 42 0 24 1 0 1 1 0 8 0 inpcb 392 1938 0 1927 46 37 9 15 0 8 7 nd6 136 49 0 28 1 0 1 1 0 8 0 pkpcb 40 10 0 10 3 2 1 1 0 8 1 kcovpl 48 16 0 7 1 0 1 1 0 8 0 ppxss 1168 9 0 9 2 2 0 1 0 8 0 pffrag 232 37 0 37 1 1 0 1 0 482 0 pffrnode 88 37 0 37 1 1 0 1 0 8 0 pffrent 40 80 0 80 1 1 0 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 108 0 99 1 0 1 1 0 8 0 pfstkey 128 108 0 99 2 0 2 2 0 8 0 pfstate 376 108 0 99 6 3 3 6 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 842 0 421 32 5 27 30 0 8 0 art_table 32 843 0 421 4 0 4 4 0 8 0 art_node 16 223 0 134 1 0 1 1 0 8 0 semapl 112 164 0 154 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 4630 0 3177 92 0 92 92 0 8 0 ffsino 272 4630 0 3177 98 0 98 98 0 8 0 nchpl 144 8256 0 6603 64 0 64 64 0 8 0 uvmvnodes 80 5880 0 0 120 0 120 120 0 8 0 vnodes 216 5880 0 0 327 0 327 327 0 8 0 vnodes: pool(0xffffffff82dd0b38:vnodes): page inconsistency: page 0x0; at page head addr 0xfffffd80715f0f90 (p 0xfffffd80715f0000) namei 1024 26619 0 26618 2 1 1 2 0 8 0 percpumem 16 72 0 25 1 0 1 1 0 8 0 vcpupl 2048 46 0 1 6 0 6 6 0 8 0 vmpool 696 49 0 4 5 0 5 5 0 8 0 kstatmem 264 76 0 50 2 0 2 2 0 8 0 scxspl 216 24731 0 24731 13 10 3 8 1 8 3 plimitpl 152 254 0 235 1 0 1 1 0 8 0 sigapl 424 2935 0 2867 8 0 8 8 0 8 0 futexpl 64 20664 0 20660 1 0 1 1 0 8 0 knotepl 120 134 0 0 4 0 4 4 0 8 0 kqueuepl 216 725 0 715 16 13 3 6 0 8 2 pipepl 320 353 0 324 8 5 3 8 0 8 0 fdescpl 496 2895 0 2866 7 2 5 5 0 8 0 filepl 152 15911 0 15640 34 19 15 18 0 8 4 lockfpl 104 523 0 520 2 1 1 2 0 8 0 lockfspl 48 237 0 234 1 0 1 1 0 8 0 sessionpl 144 33 0 15 1 0 1 1 0 8 0 pgrppl 48 174 0 156 1 0 1 1 0 8 0 ucredpl 104 1741 0 1729 1 0 1 1 0 8 0 zombiepl 144 2867 0 2867 1 0 1 1 0 8 1 processpl 1136 2935 0 2867 6 0 6 6 0 8 0 procpl 680 7405 0 7315 10 1 9 9 0 8 0 srpgc 96 12 0 12 3 3 0 1 0 8 0 sosppl 168 29 0 29 6 6 0 1 0 8 0 sockpl 584 4700 0 4669 60 50 10 17 0 8 7 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 24 0 0 2 0 2 2 0 8 0 mcl9k 9216 10 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 21 0 0 3 0 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 258 0 0 33 0 33 33 0 8 0 mtagpl 96 200 0 0 4 0 4 4 0 8 0 mbufpl 256 572 0 0 29 0 29 29 0 8 0 bufpl 280 7865 0 1547 452 0 452 452 0 8 0 anonpl 24 414878 0 399445 102 5 97 97 0 186 0 amapchunkpl 152 90006 0 89087 53 13 40 48 0 158 0 amappl16 200 8937 0 8444 27 1 26 26 0 8 0 amappl15 192 47 0 45 2 1 1 1 0 8 0 amappl14 184 194 0 180 2 1 1 2 0 8 0 amappl13 176 57 0 57 2 2 0 1 0 8 0 amappl12 168 3719 0 3687 3 1 2 2 0 8 0 amappl11 160 79 0 64 1 0 1 1 0 8 0 amappl10 152 42 0 30 2 1 1 1 0 8 0 amappl9 144 210 0 209 2 1 1 1 0 8 0 amappl8 136 316 0 242 3 0 3 3 0 8 0 amappl7 128 205 0 176 3 1 2 3 0 8 0 amappl6 120 385 0 374 1 0 1 1 0 8 0 amappl5 112 189 0 177 1 0 1 1 0 8 0 amappl4 104 547 0 521 2 1 1 2 0 8 0 amappl3 96 17469 0 17373 3 0 3 3 0 8 0 amappl2 88 3446 0 3367 3 1 2 3 0 8 0 amappl1 80 19265 0 18700 23 10 13 23 0 8 0 amappl 88 27349 0 27093 7 0 7 7 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 2944 0 2870 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2944 0 2870 1 0 1 1 0 8 0 vmmpekpl 168 26755 0 26684 4 0 4 4 0 8 0 vmmpepl 168 193860 0 191366 182 67 115 145 0 357 1 vmsppl 448 2943 0 2870 11 2 9 9 0 8 0 rwobjpl 56 58575 0 50915 110 2 108 108 0 8 0 pdppl 4096 5895 0 5785 299 183 116 117 0 8 6 pvpl 32 42173 0 0 341 0 341 341 0 265 0 pmappl 248 2943 0 2870 6 1 5 5 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 709 0 263 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace VOP_BWRITE(fffffd8065413040) at VOP_BWRITE+0x34 sys/kern/vfs_vops.c:637 ufs_mkdir(ffff800031f0be80) at ufs_mkdir+0x52c sys/ufs/ufs/ufs_vnops.c:1175 VOP_MKDIR(fffffd8074a166d8,ffff800031f0bfe0,ffff800031f0c010,ffff800031f0bf10) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff80002a21ad38,ffffff9c,7a2a4477f200,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3069 syscall(ffff800031f0c190) at syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff800031f0c190) at syscall+0x533 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a2a4477f270, count: -6 ddb{0}> machine ddbcpu 1